尼泊尔自建RC框架结构的抗震能力分析

潘毅; 王忠凯; 曲哲; 赵崇锦

doi:10.3969/j.issn.0258-2724.20170755

尼泊尔自建RC框架结构的抗震能力分析

doi: 10.3969/j.issn.0258-2724.20170755

潘毅^1,2,,
王忠凯^1,3,
曲哲^4, ,,
赵崇锦¹

基金项目: 中国地震局工程力学研究所基本科研业务专项重点资助项目（2016A05）；四川省科技支撑计划资助项目（2014SZ0110）

详细信息

作者简介:
潘毅（1977—），男，副教授，博士，研究方向为结构抗震鉴定与加固，E-mail：panyi@home.swjtu.edu.cn

通讯作者:
曲哲（1983—），男，研究员，博士，研究方向为建筑结构减隔震，E-mail：quz@iem.ac.cn

中图分类号: TU365；TU375.4
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- 文章访问数: 513
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- 被引次数: 0
出版历程
- 收稿日期: 2017-11-04
- 修回日期: 2018-05-03
- 网络出版日期: 2018-10-08
- 刊出日期: 2019-04-01

Seismic Performance of Owner-Built RC Frame Structures in Nepal

PAN Yi^{1,2
,},
WANG Zhongkai^1,3,
QU Zhe^{4
, ,},
ZHAO Chongjin¹

摘要

摘要: 2015年8.1级尼泊尔郭尔喀地震对尼泊尔北部民居造成了较大的破坏. 与采用砖木、砖石、土坯结构等结构形式的传统民居相比，当地常见的含砌体填充墙的自建钢筋混凝土（RC）框架结构的震害相对较轻. 通过静力弹塑性分析方法，从抗侧承载力、延性和抗震能力指数等方面，对比了这一结构体系和按照我国抗震规范设计的约束砌体结构的抗震能力. 针对不同层数结构的分析结果表明，在结构整体布置、层数和用钢量大致相同的条件下，与我国不同设防水平下的约束砌体结构相比，尼泊尔自建RC框架结构均表现出更好的延性性能，但其综合抗震能力随着楼层数的增加而显著降低. 对3、4层的结构，其抗震能力甚至高于按我国8度设防的要求设计建造的约束砌体结构，但对5、6层的结构，其抗震能力则远远低于后者.
- 尼泊尔地震 /
- 自建民居 /
- RC框架 /
- 约束砌体 /
- 圈梁 /
- 构造柱
Abstract: The 2015 Ms8.1 Gorkha earthquake in Nepal caused severe damage to local dwellings in Northern Nepal. Compared with brick-wood buildings, stone masonry, or adobe structures, owner-built reinforced concrete （RC） frame structures with masonry infills, which are commonly seen in both urban and rural areas in Nepal, sustained less severe damage. The seismic capacity of typical RC frame structures with masonry infills, which are representative of the local practice in Nepal, was compared with that of confined masonry structures conforming to the Chinese seismic design practice. The comparison was made in terms of lateral strength, ductility, and a previously proposed seismic capacity index through nonlinear static analysis. The analysis results on buildings with different numbers of stories show that the owner-built RC frames with masonry infills in Nepal exhibit higher ductility when the structural layout and amount of reinforcement are similar. However, their seismic capacity decreases significantly as the number of stories increases. For three and four-story buildings, owner-built RC frames exhibit higher seismic capacity compared with confined masonry structures in Intensity 8 regions in China, but exhibit much lower seismic capacity than the latter when the building is five stories or more.
- Nepal earthquake /
- owner-built residence /
- reinforced concrete frame /
- confined masonry /
- ring beam /
- structural concrete column

HTML全文

图 1 典型尼泊尔自建RC框架结构的布置

Figure 1. Typical arrangement of owner-built RC frame structures in Nepal

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图 2 尼泊尔自建RC框架结构填充墙的砌筑

Figure 2. Masonry infill of owner-built RC frame structures in Nepal

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图 3 我国约束砌体结构的马牙槎

Figure 3. Shear keys of tie columns in confined masonry structures in China

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图 4 尼泊尔典型自建RC框架结构的平面布置

Figure 4. Plan layout of typical owner-built RC frame structures in Nepal

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图 5 梁、柱截面尺寸及配筋

Figure 5. Sectional dimensions and reinforcement of beams and columns

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图 6 我国约束砌体结构的平面布置

Figure 6. Plan layout of confined masonry structures in China

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图 7 3层结构的有限元模型

Figure 7. Finite element models for 3-story structures

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图 8 基底剪力-顶点位移曲线

Figure 8. Base shear force-vertex displacement curve

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图 9 结构的抗侧承载力

Figure 9. Lateral resistance capacity of the structure

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图 10 屈服位移和极限位移的确定方法

Figure 10. Definition methods of yield and ultimate displacement

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图 11 结构的延性系数

Figure 11. Ductility factors of structure

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图 12 滞回模型

Figure 12. Hysteretic model

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图 13 结构的抗震能力指数

Figure 13. Seismic capacity indices of structure

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图 14 尼泊尔自建RC框架结构的施工缺陷

Figure 14. Construction deficiency of owner-built RC frames in Nepal

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表 1 我国约束砌体结构设计参数

Table 1. Design parameters of confined masonry structures in China for analysis

层数/层	设防烈度/度	墙厚/mm	砌块、砂浆强度等级	圈梁、构造柱截面类型	1阶周期/s
3	6～8（0.2g）	240	MU10、M5	Ⅰ	0.14
	8（0.3g）	240	首层MU15、M7.5，其它MU10、M5	Ⅰ	0.12
	9	370	首层MU20、M10，其它MU15、M7.5	Ⅱ	0.09
4	6～8（0.2g）	240	MU10、M5	Ⅰ	0.19
	8（0.3g）	370	1～2层MU20、M10，其它MU10、M5	Ⅱ	0.13
	9	370	1～2层MU30、M15，其它MU15、M7.5	Ⅱ	0.11
5	6～7（0.15g）	240	MU10、M5	Ⅰ	0.24
	8（0.2g）	240	1～2层MU15、M7.5，其它MU10、M5	Ⅰ	0.21
	8（0.3g）	370	1～2层MU30、M15，其它MU10、M5	Ⅱ	0.16
6	6～7（0.15g）	240	MU10、M5	Ⅰ	0.30
6	8（0.2g）	370	1～3层MU15、M7.5，其它MU10、M5	Ⅱ	0.23

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